Brannfenomen

Brannfenomen refers to the physical and chemical processes that occur during a fire. It encompasses a range of phenomena from ignition to extinguishment. Ignition is the initial stage where a fuel source reaches its ignition temperature in the presence of an oxidizer. This is followed by the combustion phase, a rapid chemical reaction between fuel and oxygen, producing heat, light, and various combustion products such as smoke and gases. The spread of fire is influenced by factors like fuel type, heat transfer mechanisms (conduction, convection, radiation), and the presence of oxygen. Heat transfer plays a crucial role in preheating adjacent fuels to their ignition points, perpetuating the fire. Smoke is a complex mixture of unburned fuel particles, combustion gases, and water vapor, and its production and movement are key aspects of brannfenomen. As the fire progresses, its intensity can fluctuate based on fuel availability and oxygen supply. The eventual extinguishment of a fire occurs when the fire triangle (fuel, oxygen, heat) is broken. This can be achieved by removing fuel, cooling the fuel below its ignition temperature, or displacing oxygen with an inert substance. Understanding brannfenomen is fundamental to fire prevention, fire suppression, and fire investigation.